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Posted: Mar 14, 2016

Defending Your First In

There is perhaps nothing more satisfying as an apparatus operator than beating a company into its “first in” assignment on a big “whooptie doer”-to make the initial stretch; maybe make the grab; and certainly, as a result, grab the glory. Reciprocally, there is nothing more mortifying than being beaten into the neighborhood or district on which a very serious vow was taken to protect.

A fire company’s “first due” or “first in” can be described in two ways. Geographically, the first in would describe the area covered by a company for which it is responsible. “First in” could also describe the personnel and their actions on the fireground as in, “Engine 10’s crew is first in on fire attack.” My company, in an Oklahoma fire department, vehemently defends our first in.

It will sometimes occur that an incident will be assigned to another company in our first in because of rig status on the mobile data computer (MDC). Often the rig that is dispatched will appear on the computer as nearer or a better assignment based on MDC status postings. Engine 10 will often “jump” these rides that occur in our first in to which other rigs might be assigned, because it’s in our first in, and we are responsible for its care because we are proud to be responsible for its care.

It is the intent of this article to embolden those who are maybe just beginning to drive a district-whether as acting chauffeur or in a relief capacity-to aggressively defend the grounds of the first-in district. This is not an article advocating wanton and reckless behavior.

First and foremost, a good driver operates safely gets his crew to the destination intact and calm, having not had to worry about the means by which they would traverse the often hectic and crowded streets of their first due. Essential is the operator’s commitment to provide for the citizens on the roadways, to give advanced notice of approach, and to anticipate and sometimes guide their moves. This cannot be done if the operator is anything less than adroit and single-minded in his intentions to protect the first in.

The great driver is a driver who tops his delivery of said crew with the protective aggression of a watchdog, ensuring that those operating on his watch-sometimes by themselves before second-due rigs appear-are keenly brooded over. To the great driver, his greatest duty is to stand vigil over and provide for the safety of his crew on the fireground, thus defending the first in.

En Route

Time cannot be made up on the street. This is an indisputable fact amplified by the sundry of random snags on the roadways: traffic jams, stop lights, and hazardous road conditions. Time, as it applies to fire department response, can only be “made” in the house-meaning that an apparatus’s response may only be positively affected by quickly making it to the rig, quickly dressing, and quickly and safely exiting the apparatus bay. National Fire Protection Association (NFPA) 1710, Standard for the Organization and Deployment of Fire Suppression Operations, Emergency Medical Operations, and Special Operations to the Public by Career Fire Departments, recommends 80 seconds for turnout time. It is highly encouraged that personnel get below 60 seconds to bunk out. The 20 seconds saved on the rig room floor could quite possibly be the only advantage a rig will have when seconds count. Every passing “tick” brings a citizen in the first in closer to a catastrophic loss of life or, at very least, property.

The standards for rig speed revolve primarily around acceleration. Topped out speeds are typically limited to the 65-mile-per-hour (mph) range (68 mph per NFPA) using engine governors, and it is widely accepted that for travel along city stree

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Posted: Mar 14, 2016

Defending Your First In

There is perhaps nothing more satisfying as an apparatus operator than beating a company into its “first in” assignment on a big “whooptie doer”-to make the initial stretch; maybe make the grab; and certainly, as a result, grab the glory. Reciprocally, there is nothing more mortifying than being beaten into the neighborhood or district on which a very serious vow was taken to protect.

A fire company’s “first due” or “first in” can be described in two ways. Geographically, the first in would describe the area covered by a company for which it is responsible. “First in” could also describe the personnel and their actions on the fireground as in, “Engine 10’s crew is first in on fire attack.” My company, in an Oklahoma fire department, vehemently defends our first in.

It will sometimes occur that an incident will be assigned to another company in our first in because of rig status on the mobile data computer (MDC). Often the rig that is dispatched will appear on the computer as nearer or a better assignment based on MDC status postings. Engine 10 will often “jump” these rides that occur in our first in to which other rigs might be assigned, because it’s in our first in, and we are responsible for its care because we are proud to be responsible for its care.

It is the intent of this article to embolden those who are maybe just beginning to drive a district-whether as acting chauffeur or in a relief capacity-to aggressively defend the grounds of the first-in district. This is not an article advocating wanton and reckless behavior.

First and foremost, a good driver operates safely gets his crew to the destination intact and calm, having not had to worry about the means by which they would traverse the often hectic and crowded streets of their first due. Essential is the operator’s commitment to provide for the citizens on the roadways, to give advanced notice of approach, and to anticipate and sometimes guide their moves. This cannot be done if the operator is anything less than adroit and single-minded in his intentions to protect the first in.

The great driver is a driver who tops his delivery of said crew with the protective aggression of a watchdog, ensuring that those operating on his watch-sometimes by themselves before second-due rigs appear-are keenly brooded over. To the great driver, his greatest duty is to stand vigil over and provide for the safety of his crew on the fireground, thus defending the first in.

En Route

Time cannot be made up on the street. This is an indisputable fact amplified by the sundry of random snags on the roadways: traffic jams, stop lights, and hazardous road conditions. Time, as it applies to fire department response, can only be “made” in the house-meaning that an apparatus’s response may only be positively affected by quickly making it to the rig, quickly dressing, and quickly and safely exiting the apparatus bay. National Fire Protection Association (NFPA) 1710, Standard for the Organization and Deployment of Fire Suppression Operations, Emergency Medical Operations, and Special Operations to the Public by Career Fire Departments, recommends 80 seconds for turnout time. It is highly encouraged that personnel get below 60 seconds to bunk out. The 20 seconds saved on the rig room floor could quite possibly be the only advantage a rig will have when seconds count. Every passing “tick” brings a citizen in the first in closer to a catastrophic loss of life or, at very least, property.

The standards for rig speed revolve primarily around acceleration. Topped out speeds are typically limited to the 65-mile-per-hour (mph) range (68 mph per NFPA) using engine governors, and it is widely accepted that for travel along city stree

Read more
Posted: Mar 14, 2016

Total Stopping Distance, Part 2

As you may recall from Part 1, you need three pieces of information to calculate the stopping distance of a fire apparatus: the speed of the vehicle, the braking efficiency of the vehicle, and the coefficient of friction (COF) of the roadway.

Now that we have an understanding of the factors that affect the stopping distance of a fire truck, let’s examine some real-life examples. How will the vehicle’s speed or how will the road conditions affect an emergency vehicle’s stopping distance?

Speed

First, let’s examine speed. Many fire apparatus operators don’t realize the significant impact that vehicle speed has on stopping distance. Every time you double your speed, the stopping distance quadruples!

Assuming that you are on a a dry asphalt road and with a COF of 0.70 and a braking efficiency of 65 percent (because of the air brakes and truck tires), consider the following stopping distances:

  • 20 miles per hour (mph) equals 29 feet of skid distance.
  • 30 mph equals 65 feet of skid distance.
  • 40 mph equals 117 feet of skid distance.
  • 50 mph equals 183 feet of skid distance.
  • 60 mph equals 263 feet of skid distance.

You must also remember to account for the 1.6-second perception and reaction time, which gives us the following perception and reaction distances:

  • 20 mph equals 46 feet of perception and reaction distance.
  • 30 mph equals 70 feet of perception and reaction distance.
  • 40 mph equals 93 feet of perception and reaction distance.
  • 50 mph equals 117 feet of perception and reaction distance.
  • 60 mph equals 140 feet of perception and reaction distance.

Total Stopping Distance

After calculating the skid distance and the perception and reaction distance, add the two together to determine the total stopping distance of a fire truck at each particular speed:

  • 20 mph equals 75 feet of total stopping distance.
  • 30 mph equals 135 feet of total stopping distance.
  • 40 mph equals 210 feet of total stopping distance.
  • 50 mph equals 300 feet of total stopping distance.
  • 60 mph equals 403 feet of total stopping distance.

Although it may not seem like a big difference when you are behind the wheel, you can see that driving 40 mph instead of 30 mph will add 75 feet to your total stopping distance. Seventy-five feet could be the difference between stopping safely and slamming into another vehicle.

Road Conditions

Now let’s examine how the road conditions will affect the stopping distance of the fire truck. Obviously the slicker the road, the longer it is going to take the fire truck to come to a stop. However, we tend to jump behind the wheel, turn on the magic lights and sirens, and think that they will protect us from the effects of driving recklessly in inclement weather.

We have previously calculated the

Read more
Posted: Mar 14, 2016

Total Stopping Distance, Part 2

As you may recall from Part 1, you need three pieces of information to calculate the stopping distance of a fire apparatus: the speed of the vehicle, the braking efficiency of the vehicle, and the coefficient of friction (COF) of the roadway.

Now that we have an understanding of the factors that affect the stopping distance of a fire truck, let’s examine some real-life examples. How will the vehicle’s speed or how will the road conditions affect an emergency vehicle’s stopping distance?

Speed

First, let’s examine speed. Many fire apparatus operators don’t realize the significant impact that vehicle speed has on stopping distance. Every time you double your speed, the stopping distance quadruples!

Assuming that you are on a a dry asphalt road and with a COF of 0.70 and a braking efficiency of 65 percent (because of the air brakes and truck tires), consider the following stopping distances:

  • 20 miles per hour (mph) equals 29 feet of skid distance.
  • 30 mph equals 65 feet of skid distance.
  • 40 mph equals 117 feet of skid distance.
  • 50 mph equals 183 feet of skid distance.
  • 60 mph equals 263 feet of skid distance.

You must also remember to account for the 1.6-second perception and reaction time, which gives us the following perception and reaction distances:

  • 20 mph equals 46 feet of perception and reaction distance.
  • 30 mph equals 70 feet of perception and reaction distance.
  • 40 mph equals 93 feet of perception and reaction distance.
  • 50 mph equals 117 feet of perception and reaction distance.
  • 60 mph equals 140 feet of perception and reaction distance.

Total Stopping Distance

After calculating the skid distance and the perception and reaction distance, add the two together to determine the total stopping distance of a fire truck at each particular speed:

  • 20 mph equals 75 feet of total stopping distance.
  • 30 mph equals 135 feet of total stopping distance.
  • 40 mph equals 210 feet of total stopping distance.
  • 50 mph equals 300 feet of total stopping distance.
  • 60 mph equals 403 feet of total stopping distance.

Although it may not seem like a big difference when you are behind the wheel, you can see that driving 40 mph instead of 30 mph will add 75 feet to your total stopping distance. Seventy-five feet could be the difference between stopping safely and slamming into another vehicle.

Road Conditions

Now let’s examine how the road conditions will affect the stopping distance of the fire truck. Obviously the slicker the road, the longer it is going to take the fire truck to come to a stop. However, we tend to jump behind the wheel, turn on the magic lights and sirens, and think that they will protect us from the effects of driving recklessly in inclement weather.

We have previously calculated the

Read more
Posted: Mar 14, 2016

Total Stopping Distance, Part 2

As you may recall from Part 1, you need three pieces of information to calculate the stopping distance of a fire apparatus: the speed of the vehicle, the braking efficiency of the vehicle, and the coefficient of friction (COF) of the roadway.

Now that we have an understanding of the factors that affect the stopping distance of a fire truck, let’s examine some real-life examples. How will the vehicle’s speed or how will the road conditions affect an emergency vehicle’s stopping distance?

Speed

First, let’s examine speed. Many fire apparatus operators don’t realize the significant impact that vehicle speed has on stopping distance. Every time you double your speed, the stopping distance quadruples!

Assuming that you are on a a dry asphalt road and with a COF of 0.70 and a braking efficiency of 65 percent (because of the air brakes and truck tires), consider the following stopping distances:

  • 20 miles per hour (mph) equals 29 feet of skid distance.
  • 30 mph equals 65 feet of skid distance.
  • 40 mph equals 117 feet of skid distance.
  • 50 mph equals 183 feet of skid distance.
  • 60 mph equals 263 feet of skid distance.

You must also remember to account for the 1.6-second perception and reaction time, which gives us the following perception and reaction distances:

  • 20 mph equals 46 feet of perception and reaction distance.
  • 30 mph equals 70 feet of perception and reaction distance.
  • 40 mph equals 93 feet of perception and reaction distance.
  • 50 mph equals 117 feet of perception and reaction distance.
  • 60 mph equals 140 feet of perception and reaction distance.

Total Stopping Distance

After calculating the skid distance and the perception and reaction distance, add the two together to determine the total stopping distance of a fire truck at each particular speed:

  • 20 mph equals 75 feet of total stopping distance.
  • 30 mph equals 135 feet of total stopping distance.
  • 40 mph equals 210 feet of total stopping distance.
  • 50 mph equals 300 feet of total stopping distance.
  • 60 mph equals 403 feet of total stopping distance.

Although it may not seem like a big difference when you are behind the wheel, you can see that driving 40 mph instead of 30 mph will add 75 feet to your total stopping distance. Seventy-five feet could be the difference between stopping safely and slamming into another vehicle.

Road Conditions

Now let’s examine how the road conditions will affect the stopping distance of the fire truck. Obviously the slicker the road, the longer it is going to take the fire truck to come to a stop. However, we tend to jump behind the wheel, turn on the magic lights and sirens, and think that they will protect us from the effects of driving recklessly in inclement weather.

We have previously calculated the

Read more
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